Transmission-system switch



June 25, 1929. T. PANZEIRBIETER ET AL 1.718.251

TRANSMISSION SYSTEM SWITCH Filed May-8,. 192s IN VENTORS. 77Ieod0r Panzerb/klr &

ATTbRNEY Patented June 25, 1929.

UNITED STATES PATENT OFFICE.

THEODOB FANZERBIETER, OF BERLIN-CHARLOTTENBURG, AND WILHELM NAGEL, OF BERLIN, GERMANY, ASSIGNORS 'IO WESTINGHOUSE ELECTRIC & MANUFACTUR- ING COMPANY, OF NEW YORK, N. Y., A CORPORATION.

v TRANSMISSION-SYSTEM SWITCH.

HEISSUED Application filed Kay 8; 1925, Serial No. 28,816, and in Germany April-f7. 1924.

Our invention r elates to improvements in transmission-system switches of that type in which the switch blades are. supported by an insulator rotatably arranged between the two stationary supporting insulators carrying the lines.

It is well lmown that such transmissionline switches become clogged by ice in winter so that the closing and the opening of the switch then becomes diflicult, if not altogether impossible.

Our inventionconsists of an improved arrangement and construction of such switches in which the blade is loosened in the contacts prior to the switch being opened so that the opening of the switch is greatly facilitated. According to our invention, the switch blade is made movable in relation to the rotatable insulator. 4

In the drawing affixed to our specification and forming part thereof:

Figures 1 and 2 are plan views of a switch embodying our invention.

Fig. 3 is a view in elevation of the switch structure of Figs. 1 and 2.

In the constructions illustrated in the figures the bridging member comprises two blades, each of which is eccentrically ful-' crumed upon the rotary insulatorz' At the commencement of the opening motion of the switch the fulcrum 2 for instance, in Fig. 1 moves in a circle and causes angular movement of the blade m and thereby cracks the ice. When the blade m, has reached the position indicated in broken lines, its end comes in contact with the stop a and subsequently the blade is forced out of the stationary contact k A similar process takes place with the blade m at the stationary contact 70 In the arrangement illustrated in Fig. 4 the fulcrum pins 2 and 2 are located sideways from the connecting line of the two stationary contacts 70 and 70 On turning the rotary insulator i clockwise for the purpose of opening the switch the blades m and m are loosened in'their stationary contacts K circuit.

and K by a movement in the direction of their longitudinal axis and only after this has happened do the stops a and a, come in contact with and carry the blades m and m along in an are around the axis of rotation of the insulator i to completely open the In the arrangement ofboth Figs. 1 and 2,, to secure the position of the switch blade in the opened state upon the rotary insulator a spring S is arranged upon the latter which forces the switch blade against a stop upon the insulator by means of which stop the blade is forced into the stationary contacts K and K when the switch is closed again. These stops are shown in the figures indicated by the reference letter a I Accordingly, throughout the movement to closed position, theswitch blades occupy the positions relative to each other which are indicated by the full lines in Figs. 1 and 2, thus acting in closing like ordinary rigid switch blades of the prior art. The movement to the positions indicated by dotted lines are merely efi'ected to break ice-seals when it is desired to open the switch.

It will be understood that the details of construction may be modified within the ambit of the claim without departing from the spirit of our invention.

What we claim as our invention is In a switch, a rotary insulator and stationary insulators spaced from said rotary insulator, contacts on said stationary insulators, bridging means comprising blade members each eccentrically pivoted upon said rotary insulator, stop means upon said rotary insulator adapted to force the blade members into engagement with said contacts when closing said switch, and spring means adapted to force said blade members against said stop means when said switch, is open.

In testimony whereof we afiix our signatures.

THEODOR PANZERBIETER. WILI-[ELM NAGEL. 

